Suherdin, S., N. Widajati, and M. B. Qomaruddin. “How to Improve Safety Commitment: A Case Study on a Plastic Manufacturer in East Java”. The Indonesian Journal of Occupational Safety and Health, vol. 10, no. 3, Nov. 2021, pp. 289-98, doi:10.20473/ijosh.v10i3.2021.289-298.